What is XML Tag Generation? and How to Generate XML Tag ?

 How to Generate  XML Tag ?

CREATE OR REPLACE PACKAGE nilesh_XML AS

PROCEDURE put_xml_tags(i_tag_type_flag IN VARCHAR2
                      ,i_tag_name      IN VARCHAR2 DEFAULT NULL
                      );

PROCEDURE put_xml_data ( i_xml_tags IN VARCHAR2
                       , i_output  IN VARCHAR2
                       )
PROCEDURE XX_XML (i_employee_number IN VARCHAR2);
            
END;

CREATE OR REPLACE PACKAGE nilesh_XML AS

PROCEDURE put_xml_tags(i_tag_type_flag IN VARCHAR2
                      ,i_tag_name      IN VARCHAR2 DEFAULT NULL
                      )
IS
--
  l_strng VARCHAR2(32376);
--
BEGIN
--
  CASE
  WHEN i_tag_type_flag = 'S' THEN
--
      l_strng := '';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
      l_strng := '';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
      l_strng := ''|| USERENV('LANG') ||'';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
      l_strng := ''|| TO_CHAR(SYSDATE,'DD-MON-RRRR') ||'';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
    WHEN i_tag_type_flag = 'E' THEN
--
        l_strng := '';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
    WHEN i_tag_type_flag = 'G' THEN
--
      l_strng := '<'||i_tag_name||'>';
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
  END CASE;
--
EXCEPTION
  WHEN OTHERS THEN
    FND_FILE.PUT_LINE(FND_FILE.LOG,'PERC1428-put_xml_tags Function Error '||SQLERRM);
--
END put_xml_tags;
--
PROCEDURE put_xml_data ( i_xml_tags IN VARCHAR2
                       , i_output  IN VARCHAR2
                       )
IS
  i_occ       NUMBER(2):=1;
  l_xml_tag   VARCHAR2(32767);
  l_output    VARCHAR2(32767) ;
  l_strng     VARCHAR2(32767);
 BEGIN
--
    WHILE (INSTR(i_xml_tags,'#',1,i_occ)!=0) LOOP
      BEGIN
        SELECT  SUBSTR(i_xml_tags,DECODE(i_occ,1,1,INSTR(i_xml_tags,'#',1,i_occ-1)+1),INSTR(i_xml_tags,'#',1,i_occ)-DECODE(i_occ,1,1,INSTR(i_xml_tags,'#',1,i_occ-1)+1))
        INTO l_xml_tag
        FROM dual;
    EXCEPTION
      WHEN OTHERS THEN
          l_xml_tag :='END';
    END;
--
    BEGIN
       SELECT  SUBSTR(i_output,DECODE(i_occ,1,1,INSTR(i_output,'#',1,i_occ-1)+1),INSTR(i_output,'#',1,i_occ)-DECODE(i_occ,1,1,INSTR(i_output,'#',1,i_occ-1)+1))
       INTO l_output
       FROM dual;
    EXCEPTION
       WHEN OTHERS THEN
         l_output :='';
    END;
--
      l_strng:= ('<'||l_xml_tag||'>'||''||'');
      FND_FILE.PUT_LINE(FND_FILE.OUTPUT,l_strng||CHR(10));
--
      i_occ := i_occ+1;
--
   END LOOP;
   --
 EXCEPTION
   WHEN OTHERS THEN
      FND_FILE.PUT_LINE(FND_FILE.LOG,'PERC1428- put_xml_data Function Error '||SQLERRM);
END put_xml_data;

PROCEDURE XX_XML( o_errbuf             OUT VARCHAR2 -- Error Message
                , o_retcode            OUT VARCHAR2 -- Error Code
                , i_employee_number    IN  VARCHAR2
AS
 l_xml_tags VARCHAR2(32376);
 l_xml_data VARCHAR2(32376);
 CURSOR c_emp_info ( i_employee_number  IN NUMBER
                   )
 IS
 Select first_name, last_name, full_name, employee_number from per_all_people_f where employee_number=i_employee_number;

BEGIN
    put_xml_tags('S');   
    put_xml_tags('G','G_EMP_INFO');
    BEGIN
      FOR r_emp_info IN c_emp_info(i_employee_number)
      LOOP
         l_xml_tags := 'LAST_NAME#FIRST_NAME#FULL_NAME#EMPLOYEE_NUMBER#';
         l_xml_data := r_emp_info.last_name                     || '#' ||
                       r_emp_info.first_name                    || '#' ||
                       r_emp_info.full_name                     || '#' ||
               r_emp_info.employee_number               || '#' ;
         put_xml_data(l_xml_tags,l_xml_data);
       END LOOP;
    put_xml_tags('G','/G_EMP_INFO');
    put_xml_tags('E');
EXCEPTION
  WHEN OTHERS THEN
       FND_FILE.PUT_LINE(FND_FILE.LOG,'Error occured IN PERC1435' || SQLERRM);
END XX_XML;

END nilesh_XML;
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